[Enhancement] enable adaptive partition hash join by default

Signed-off-by: stdpain <[email protected]>
StarRocks · Sep 20, 2024 · 7686955 · 7686955
1 parent 45d72ac
commit 7686955
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Showing 2 changed files with 10 additions and 6 deletions.
diff --git a/be/src/exec/pipeline/hashjoin/spillable_hash_join_build_operator.cpp b/be/src/exec/pipeline/hashjoin/spillable_hash_join_build_operator.cpp
@@ -249,13 +249,17 @@ StatusOr<std::function<StatusOr<ChunkPtr>()>> SpillableHashJoinBuildOperator::_c
 
     return [this]() -> StatusOr<ChunkPtr> {
         if (_hash_table_build_chunk_slice.empty()) {
-            if (_hash_table_iterate_idx + 1 >= _hash_tables.size()) {
+            for (; _hash_table_iterate_idx < _hash_tables.size(); _hash_table_iterate_idx++) {
+                auto build_chunk = _hash_tables[_hash_table_iterate_idx]->get_build_chunk();
+                if (build_chunk->num_rows() > 0) {
+                    _hash_table_build_chunk_slice.reset(build_chunk);
+                    _hash_table_build_chunk_slice.skip(kHashJoinKeyColumnOffset);
+                    break;
+                }
+            }
+            if (_hash_table_build_chunk_slice.empty()) {
                 _join_builder->hash_join_builder()->reset(_join_builder->hash_table_param());
                 return Status::EndOfFile("eos");
-            } else {
-                _hash_table_iterate_idx++;
-                _hash_table_build_chunk_slice.reset(_hash_tables[_hash_table_iterate_idx]->get_build_chunk());
-                _hash_table_build_chunk_slice.skip(kHashJoinKeyColumnOffset);
             }
         }
 

diff --git a/fe/fe-core/src/main/java/com/starrocks/qe/SessionVariable.java b/fe/fe-core/src/main/java/com/starrocks/qe/SessionVariable.java
@@ -1263,7 +1263,7 @@ public static MaterializedViewRewriteMode parse(String str) {
     private boolean joinLateMaterialization = false;
 
     @VariableMgr.VarAttr(name = ENABLE_PARTITION_HASH_JOIN)
-    private boolean enablePartitionHashJoin = false;
+    private boolean enablePartitionHashJoin = true;
 
     @VariableMgr.VarAttr(name = ENABLE_PRUNE_COLUMN_AFTER_INDEX_FILTER, flag = VariableMgr.INVISIBLE)
     private boolean enablePruneColumnAfterIndexFilter = true;